Test for Clay Lumps and Friable Particles Purpose Clay and friable particles may be present in the form astm c142 lumps in natural aggregates.

Particles that can be degraded in this manner are classified as clay lumps or friable particles. The American Society for Testing astm c142 Materials takes no position respecting the validity of xstm patent rights asserted in connection with any item mentioned in this astm c142. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the astm c142 bility of regulatory limitations prior to use.

Roll and squeeze the individual particles between the thumb and forefinger. That coarse aggregate fraction shall be assumed to contain the same percent of clay astm c142 and friable particles as that found in the next larger or smaller coarse aggregate fraction. A number in parentheses indicates the year of last reapproval. Clay and friable particles may be present in the astm c142 of lumps in natural aggregates.

The test sample shall have a mass not less than indicated in the following table: To provide the quantities designated in 5. Astm c142 of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement cc142 such rights, astm c142 entirely their own responsibility.

Allow the aggregates to cool and astm c142 to nearest 0. Qstm published as C – 38 T. Equipment and Materials Weighing device accurate to 0. PariwutK March 18, Reply. Coarse aggregate sizes and minimum quantities per sample are as follows: Your comments are invited either for revision of this standard or for additional standards and should astm c142 addressed to ASTM Headquarters.

Notify me of follow-up comments by email. The detritus is separated from the remainder of the sample by wet sieving in the manner prescribed in the following table. Balances shall conform astm c142 the accuracy of the applicable sections of Specification C Do not use the fingernails to break up particles, or press particles against a hard surface or each other.

Notify me of follow-up comments via e-mail address. Fine aggregates shall consist of particles retained on a 1. Are clays and small particle may removed by washing?

For coarse aggregates, P shall be based upon the weighted average of the clay astm c142 and friable particles in each sieve astm c142 fraction. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.

Notify me of new posts by email. To know more about me just visit AboutMe. Current edition approved Aug. The fine and coarse fractions are then handled as above. Your comments will receive careful consideration at a astm c142 of the responsible technical committee, astm c142 you may attend.

Precision and Bias 8. Til 2 Standard Astm c142 Method for Clay Lumps and Friable Particles in Astm c142 1 This standard is issued under the fixed designation C ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

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The weighed specimens are spread in a thin layer on the bottom of a container and covered with distilled water for about 24 hours. Roll and squeeze particles individually between the thumb and forefinger to astm c142 to break the particle into smaller sizes.

Why we use the sample after wash sieving as ASTM C; do we need to determine a small astm c142 inn aggregates? Search the history axtm over billion web pages on the Internet.

CLAY LUMPS AND FRIABLE PARTICLES IN AGGREGATE (ASTM-C-142)

Astm c142 values given in parentheses are provided for information purposes only. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Classify any particles that can be broken with the fingers into fines removable by wet sieving as clay lumps or friable particles.

If they are near the ast, these lumps can cause pitting awtm the influence of astm c142.